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Fix issue that node is still reachable after executing ifconfig –c.
[mirror_edk2.git] / MdeModulePkg / Universal / Network / Ip4ConfigDxe / Ip4Config.h
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83cbd279 1/** @file\r
402fa70f 2 Header file for IP4Config driver.\r
83cbd279 3\r
5f6aee0f 4Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>\r
e5eed7d3 5This program and the accompanying materials\r
83cbd279 6are licensed and made available under the terms and conditions of the BSD License\r
402fa70f 7which accompanies this distribution. The full text of the license may be found at<BR>\r
83cbd279 8http://opensource.org/licenses/bsd-license.php\r
9\r
10THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
11WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
12\r
83cbd279 13**/\r
14\r
402fa70f 15#ifndef _EFI_IP4CONFIG_H_\r
16#define _EFI_IP4CONFIG_H_\r
83cbd279 17\r
c8d8f1e3 18#include <Uefi.h>\r
b2570da8 19\r
20#include <Protocol/Dhcp4.h>\r
24e58768 21#include <Protocol/Ip4Config.h>\r
b2570da8 22#include <Protocol/ManagedNetwork.h>\r
63886849 23#include <Protocol/HiiConfigAccess.h>\r
24#include <Protocol/HiiDatabase.h>\r
25#include <Protocol/HiiConfigRouting.h>\r
d80ea739 26#include <Protocol/ServiceBinding.h>\r
b2570da8 27\r
63886849 28#include <Guid/MdeModuleHii.h>\r
74df5026 29#include <Guid/NicIp4ConfigNvData.h>\r
63886849 30\r
31#include <Library/DevicePathLib.h>\r
b2570da8 32#include <Library/DebugLib.h>\r
33#include <Library/UefiRuntimeServicesTableLib.h>\r
34#include <Library/UefiDriverEntryPoint.h>\r
35#include <Library/UefiBootServicesTableLib.h>\r
36#include <Library/UefiLib.h>\r
37#include <Library/NetLib.h>\r
38#include <Library/BaseMemoryLib.h>\r
83cbd279 39#include <Library/MemoryAllocationLib.h>\r
63886849 40#include <Library/HiiLib.h>\r
41#include <Library/PrintLib.h>\r
d8d26fb2 42#include <Library/DpcLib.h>\r
d80ea739 43#include <Library/UefiHiiServicesLib.h>\r
83cbd279 44\r
83cbd279 45\r
c8d8f1e3 46//\r
63886849 47// Global variables\r
c8d8f1e3 48//\r
f6b7393c 49extern EFI_DRIVER_BINDING_PROTOCOL gIp4ConfigDriverBinding;\r
50extern EFI_COMPONENT_NAME_PROTOCOL gIp4ConfigComponentName;\r
51extern EFI_COMPONENT_NAME2_PROTOCOL gIp4ConfigComponentName2;\r
d80ea739 52\r
f6b7393c 53extern EFI_IP4_CONFIG_PROTOCOL mIp4ConfigProtocolTemplate;\r
c8d8f1e3 54\r
55#define IP4_PROTO_ICMP 0x01\r
56#define IP4_CONFIG_INSTANCE_SIGNATURE SIGNATURE_32 ('I', 'P', '4', 'C')\r
57\r
f6b7393c 58#define IP4_CONFIG_STATE_IDLE 0\r
59#define IP4_CONFIG_STATE_STARTED 1\r
60#define IP4_CONFIG_STATE_CONFIGURED 2\r
61\r
62#define DHCP_TAG_PARA_LIST 55\r
63#define DHCP_TAG_NETMASK 1\r
64#define DHCP_TAG_ROUTER 3\r
65\r
83cbd279 66\r
67//\r
68// Configure the DHCP to request the routers and netmask\r
69// from server. The DHCP_TAG_NETMASK is included in Head.\r
70//\r
71#pragma pack(1)\r
72typedef struct {\r
73 EFI_DHCP4_PACKET_OPTION Head;\r
74 UINT8 Route;\r
75} IP4_CONFIG_DHCP4_OPTION;\r
76#pragma pack()\r
77\r
d80ea739 78typedef struct _IP4CONFIG_CALLBACK_INFO {\r
c22b6cdf 79 BOOLEAN Configured;\r
80 BOOLEAN DhcpEnabled;\r
d80ea739 81 EFI_IPv4_ADDRESS LocalIp;\r
82 EFI_IPv4_ADDRESS SubnetMask;\r
83 EFI_IPv4_ADDRESS Gateway;\r
84} IP4_SETTING_INFO;\r
63886849 85\r
72ed3d75 86typedef struct _IP4_CONFIG_INSTANCE {\r
d80ea739 87 UINT32 Signature;\r
88 EFI_HANDLE Controller;\r
89 EFI_HANDLE Image;\r
90 EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;\r
83cbd279 91\r
d80ea739 92 EFI_IP4_CONFIG_PROTOCOL Ip4ConfigProtocol;\r
63886849 93\r
d80ea739 94 EFI_HII_CONFIG_ACCESS_PROTOCOL HiiConfigAccessProtocol;\r
95 EFI_HANDLE ChildHandle;\r
96 EFI_DEVICE_PATH_PROTOCOL *HiiVendorDevicePath;\r
97 EFI_HII_HANDLE RegisteredHandle;\r
98 IP4_SETTING_INFO Ip4ConfigCallbackInfo;\r
83cbd279 99\r
100 //\r
101 // NicConfig's state, such as IP4_CONFIG_STATE_IDLE\r
102 //\r
d80ea739 103 INTN State;\r
83cbd279 104\r
105 //\r
106 // Mnp child to keep the connection with MNP.\r
107 //\r
d80ea739 108 EFI_MANAGED_NETWORK_PROTOCOL *Mnp;\r
109 EFI_HANDLE MnpHandle;\r
83cbd279 110\r
111 //\r
112 // User's requests data\r
113 //\r
d80ea739 114 EFI_EVENT DoneEvent;\r
115 EFI_EVENT ReconfigEvent;\r
116 EFI_STATUS Result;\r
83cbd279 117\r
118 //\r
119 // Identity of this interface and some configuration info.\r
120 //\r
d80ea739 121 NIC_ADDR NicAddr;\r
74df5026 122 CHAR16 *MacString;\r
d80ea739 123 NIC_IP4_CONFIG_INFO *NicConfig;\r
83cbd279 124\r
125 //\r
126 // DHCP handles to access DHCP\r
127 //\r
d80ea739 128 EFI_DHCP4_PROTOCOL *Dhcp4;\r
129 EFI_HANDLE Dhcp4Handle;\r
130 EFI_EVENT Dhcp4Event;\r
9f82599a 131\r
132 //\r
133 // A dedicated timer is used to poll underlying media status\r
134 //\r
135 EFI_EVENT Timer;\r
136\r
137 //\r
138 // Underlying media present status. \r
139 //\r
5f6aee0f 140 BOOLEAN MediaPresent;\r
141\r
142 //\r
143 // A flag to indicate EfiIp4ConfigStart should not run\r
144 //\r
145 BOOLEAN DoNotStart;\r
72ed3d75 146} IP4_CONFIG_INSTANCE;\r
83cbd279 147\r
148#define IP4_CONFIG_INSTANCE_FROM_IP4CONFIG(this) \\r
149 CR (this, IP4_CONFIG_INSTANCE, Ip4ConfigProtocol, IP4_CONFIG_INSTANCE_SIGNATURE)\r
150\r
d80ea739 151#define IP4_CONFIG_INSTANCE_FROM_CONFIG_ACCESS(this) \\r
152 CR (this, IP4_CONFIG_INSTANCE, HiiConfigAccessProtocol, IP4_CONFIG_INSTANCE_SIGNATURE)\r
63886849 153\r
154\r
155/**\r
d80ea739 156 Set the IP configure parameters for this NIC.\r
63886849 157\r
d80ea739 158 If Reconfig is TRUE, the IP driver will be informed to discard current\r
159 auto configure parameter and restart the auto configuration process.\r
63886849 160 If current there is a pending auto configuration, EFI_ALREADY_STARTED is\r
161 returned. You can only change the configure setting when either\r
162 the configure has finished or not started yet. If NicConfig, the\r
163 NIC's configure parameter is removed from the variable.\r
164\r
165 @param Instance The IP4 CONFIG instance.\r
d80ea739 166 @param NicConfig The new NIC IP4 configure parameter.\r
63886849 167 @param Reconfig Inform the IP4 driver to restart the auto\r
d80ea739 168 configuration.\r
169\r
170 @retval EFI_SUCCESS The configure parameter for this NIC was\r
171 set successfully.\r
63886849 172 @retval EFI_INVALID_PARAMETER This is NULL or the configure parameter is\r
173 invalid.\r
174 @retval EFI_ALREADY_STARTED There is a pending auto configuration.\r
d80ea739 175 @retval EFI_NOT_FOUND No auto configure parameter is found.\r
63886849 176\r
177**/\r
178EFI_STATUS\r
179EFIAPI\r
180EfiNicIp4ConfigSetInfo (\r
181 IN IP4_CONFIG_INSTANCE *Instance,\r
182 IN NIC_IP4_CONFIG_INFO *NicConfig OPTIONAL,\r
183 IN BOOLEAN Reconfig\r
184 );\r
185\r
186/**\r
74df5026 187 Get the NIC's configure information from the IP4 configure variable.\r
188 It will remove the invalid variable.\r
63886849 189\r
74df5026 190 @param Instance The IP4 CONFIG instance.\r
63886849 191\r
74df5026 192 @return NULL if no configure for the NIC in the variable, or it is invalid.\r
193 Otherwise the pointer to the NIC's IP configure parameter will be returned.\r
63886849 194\r
195**/\r
74df5026 196NIC_IP4_CONFIG_INFO *\r
63886849 197EfiNicIp4ConfigGetInfo (\r
74df5026 198 IN IP4_CONFIG_INSTANCE *Instance\r
63886849 199 );\r
83cbd279 200\r
7bce0c5a 201/**\r
202 Release all the DHCP related resources.\r
203\r
204 @param This The IP4 configure instance\r
205\r
206 @return None\r
207\r
208**/\r
83cbd279 209VOID\r
210Ip4ConfigCleanDhcp4 (\r
c8d8f1e3 211 IN IP4_CONFIG_INSTANCE *This\r
83cbd279 212 );\r
213\r
7bce0c5a 214/**\r
215 Clean up all the configuration parameters.\r
216\r
217 @param Instance The IP4 configure instance\r
218\r
219 @return None\r
220\r
221**/\r
83cbd279 222VOID\r
223Ip4ConfigCleanConfig (\r
224 IN IP4_CONFIG_INSTANCE *Instance\r
225 );\r
63886849 226\r
c8d8f1e3 227//\r
228// EFI Component Name Functions\r
229//\r
230\r
231/**\r
232 Retrieves a Unicode string that is the user readable name of the driver.\r
233\r
234 This function retrieves the user readable name of a driver in the form of a\r
235 Unicode string. If the driver specified by This has a user readable name in\r
236 the language specified by Language, then a pointer to the driver name is\r
237 returned in DriverName, and EFI_SUCCESS is returned. If the driver specified\r
238 by This does not support the language specified by Language,\r
239 then EFI_UNSUPPORTED is returned.\r
240\r
241 @param This[in] A pointer to the EFI_COMPONENT_NAME2_PROTOCOL or\r
242 EFI_COMPONENT_NAME_PROTOCOL instance.\r
243 @param Language[in] A pointer to a Null-terminated ASCII string\r
244 array indicating the language. This is the\r
245 language of the driver name that the caller is\r
246 requesting, and it must match one of the\r
247 languages specified in SupportedLanguages. The\r
248 number of languages supported by a driver is up\r
249 to the driver writer. Language is specified\r
63886849 250 in RFC 3066 or ISO 639-2 language code format.\r
c8d8f1e3 251 @param DriverName[out] A pointer to the Unicode string to return.\r
252 This Unicode string is the name of the\r
253 driver specified by This in the language\r
254 specified by Language.\r
255\r
256 @retval EFI_SUCCESS The Unicode string for the Driver specified by\r
257 This and the language specified by Language was\r
258 returned in DriverName.\r
259 @retval EFI_INVALID_PARAMETER Language is NULL.\r
260 @retval EFI_INVALID_PARAMETER DriverName is NULL.\r
261 @retval EFI_UNSUPPORTED The driver specified by This does not support\r
262 the language specified by Language.\r
263\r
264**/\r
265EFI_STATUS\r
266EFIAPI\r
267Ip4ConfigComponentNameGetDriverName (\r
268 IN EFI_COMPONENT_NAME_PROTOCOL *This,\r
269 IN CHAR8 *Language,\r
270 OUT CHAR16 **DriverName\r
271 );\r
272\r
273/**\r
274 Retrieves a Unicode string that is the user readable name of the controller\r
275 that is being managed by a driver.\r
276\r
277 This function retrieves the user readable name of the controller specified by\r
278 ControllerHandle and ChildHandle in the form of a Unicode string. If the\r
279 driver specified by This has a user readable name in the language specified by\r
280 Language, then a pointer to the controller name is returned in ControllerName,\r
281 and EFI_SUCCESS is returned. If the driver specified by This is not currently\r
282 managing the controller specified by ControllerHandle and ChildHandle,\r
283 then EFI_UNSUPPORTED is returned. If the driver specified by This does not\r
284 support the language specified by Language, then EFI_UNSUPPORTED is returned.\r
285\r
286 @param This[in] A pointer to the EFI_COMPONENT_NAME2_PROTOCOL or\r
287 EFI_COMPONENT_NAME_PROTOCOL instance.\r
288 @param ControllerHandle[in] The handle of a controller that the driver\r
289 specified by This is managing. This handle\r
290 specifies the controller whose name is to be\r
291 returned.\r
292 @param ChildHandle[in] The handle of the child controller to retrieve\r
293 the name of. This is an optional parameter that\r
294 may be NULL. It will be NULL for device\r
295 drivers. It will also be NULL for a bus drivers\r
296 that wish to retrieve the name of the bus\r
297 controller. It will not be NULL for a bus\r
298 driver that wishes to retrieve the name of a\r
299 child controller.\r
300 @param Language[in] A pointer to a Null-terminated ASCII string\r
301 array indicating the language. This is the\r
302 language of the driver name that the caller is\r
303 requesting, and it must match one of the\r
304 languages specified in SupportedLanguages. The\r
305 number of languages supported by a driver is up\r
306 to the driver writer. Language is specified in\r
63886849 307 RFC 3066 or ISO 639-2 language code format.\r
c8d8f1e3 308 @param ControllerName[out] A pointer to the Unicode string to return.\r
309 This Unicode string is the name of the\r
310 controller specified by ControllerHandle and\r
311 ChildHandle in the language specified by\r
312 Language from the point of view of the driver\r
313 specified by This.\r
63886849 314\r
c8d8f1e3 315 @retval EFI_SUCCESS The Unicode string for the user readable name in\r
316 the language specified by Language for the\r
317 driver specified by This was returned in\r
318 DriverName.\r
284ee2e8 319 @retval EFI_INVALID_PARAMETER ControllerHandle is NULL.\r
c8d8f1e3 320 @retval EFI_INVALID_PARAMETER ChildHandle is not NULL and it is not a valid\r
321 EFI_HANDLE.\r
322 @retval EFI_INVALID_PARAMETER Language is NULL.\r
323 @retval EFI_INVALID_PARAMETER ControllerName is NULL.\r
324 @retval EFI_UNSUPPORTED The driver specified by This is not currently\r
325 managing the controller specified by\r
326 ControllerHandle and ChildHandle.\r
327 @retval EFI_UNSUPPORTED The driver specified by This does not support\r
328 the language specified by Language.\r
329\r
330**/\r
331EFI_STATUS\r
332EFIAPI\r
333Ip4ConfigComponentNameGetControllerName (\r
334 IN EFI_COMPONENT_NAME_PROTOCOL *This,\r
335 IN EFI_HANDLE ControllerHandle,\r
336 IN EFI_HANDLE ChildHandle OPTIONAL,\r
337 IN CHAR8 *Language,\r
338 OUT CHAR16 **ControllerName\r
339 );\r
63886849 340\r
c8d8f1e3 341/**\r
342 Test to see if this driver supports ControllerHandle.\r
343\r
344 @param This Protocol instance pointer.\r
345 @param ControllerHandle Handle of device to test\r
346 @param RemainingDevicePath Optional parameter use to pick a specific child\r
347 device to start.\r
348\r
349 @retval EFI_SUCCES This driver supports this device\r
350 @retval EFI_ALREADY_STARTED This driver is already running on this device\r
351 @retval other This driver does not support this device\r
352\r
353**/\r
354EFI_STATUS\r
355EFIAPI\r
356Ip4ConfigDriverBindingSupported (\r
357 IN EFI_DRIVER_BINDING_PROTOCOL *This,\r
358 IN EFI_HANDLE ControllerHandle,\r
359 IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL\r
360 );\r
63886849 361\r
c8d8f1e3 362/**\r
363 Start this driver on ControllerHandle.\r
364\r
365 @param This Protocol instance pointer.\r
366 @param ControllerHandle Handle of device to bind driver to\r
367 @param RemainingDevicePath Optional parameter use to pick a specific child\r
368 device to start.\r
369\r
370 @retval EFI_SUCCES This driver is added to ControllerHandle\r
371 @retval EFI_ALREADY_STARTED This driver is already running on ControllerHandle\r
372 @retval other This driver does not support this device\r
373\r
374**/\r
375EFI_STATUS\r
376EFIAPI\r
377Ip4ConfigDriverBindingStart (\r
378 IN EFI_DRIVER_BINDING_PROTOCOL *This,\r
379 IN EFI_HANDLE ControllerHandle,\r
380 IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL\r
381 );\r
63886849 382\r
c8d8f1e3 383/**\r
384 Stop this driver on ControllerHandle.\r
385\r
386 @param This Protocol instance pointer.\r
387 @param ControllerHandle Handle of device to stop driver on\r
388 @param NumberOfChildren Number of Handles in ChildHandleBuffer. If number of\r
389 children is zero stop the entire bus driver.\r
390 @param ChildHandleBuffer List of Child Handles to Stop.\r
391\r
392 @retval EFI_SUCCES This driver is removed ControllerHandle\r
393 @retval other This driver was not removed from this device\r
394\r
395**/\r
396EFI_STATUS\r
397EFIAPI\r
398Ip4ConfigDriverBindingStop (\r
399 IN EFI_DRIVER_BINDING_PROTOCOL *This,\r
400 IN EFI_HANDLE ControllerHandle,\r
401 IN UINTN NumberOfChildren,\r
402 IN EFI_HANDLE *ChildHandleBuffer\r
403 );\r
63886849 404\r
72ed3d75 405/**\r
406 Starts running the configuration policy for the EFI IPv4 Protocol driver.\r
407\r
408 The Start() function is called to determine and to begin the platform\r
409 configuration policy by the EFI IPv4 Protocol driver. This determination may\r
410 be as simple as returning EFI_UNSUPPORTED if there is no EFI IPv4 Protocol\r
411 driver configuration policy. It may be as involved as loading some defaults\r
412 from nonvolatile storage, downloading dynamic data from a DHCP server, and\r
413 checking permissions with a site policy server.\r
414 Starting the configuration policy is just the beginning. It may finish almost\r
415 instantly or it may take several minutes before it fails to retrieve configuration\r
416 information from one or more servers. Once the policy is started, drivers\r
417 should use the DoneEvent parameter to determine when the configuration policy\r
418 has completed. EFI_IP4_CONFIG_PROTOCOL.GetData() must then be called to\r
419 determine if the configuration succeeded or failed.\r
420 Until the configuration completes successfully, EFI IPv4 Protocol driver instances\r
421 that are attempting to use default configurations must return EFI_NO_MAPPING.\r
422 Once the configuration is complete, the EFI IPv4 Configuration Protocol driver\r
423 signals DoneEvent. The configuration may need to be updated in the future,\r
424 however; in this case, the EFI IPv4 Configuration Protocol driver must signal\r
425 ReconfigEvent, and all EFI IPv4 Protocol driver instances that are using default\r
426 configurations must return EFI_NO_MAPPING until the configuration policy has\r
427 been rerun.\r
428\r
429 @param This Pointer to the EFI_IP4_CONFIG_PROTOCOL instance.\r
430 @param DoneEvent Event that will be signaled when the EFI IPv4\r
431 Protocol driver configuration policy completes\r
432 execution. This event must be of type EVT_NOTIFY_SIGNAL.\r
433 @param ReconfigEvent Event that will be signaled when the EFI IPv4\r
434 Protocol driver configuration needs to be updated.\r
435 This event must be of type EVT_NOTIFY_SIGNAL.\r
436\r
437 @retval EFI_SUCCESS The configuration policy for the EFI IPv4 Protocol\r
438 driver is now running.\r
439 @retval EFI_INVALID_PARAMETER One or more of the following parameters is NULL:\r
440 This\r
441 DoneEvent\r
442 ReconfigEvent\r
443 @retval EFI_OUT_OF_RESOURCES Required system resources could not be allocated.\r
444 @retval EFI_ALREADY_STARTED The configuration policy for the EFI IPv4 Protocol\r
445 driver was already started.\r
446 @retval EFI_DEVICE_ERROR An unexpected system error or network error occurred.\r
447 @retval EFI_UNSUPPORTED This interface does not support the EFI IPv4 Protocol\r
448 driver configuration.\r
449\r
450**/\r
451EFI_STATUS\r
452EFIAPI\r
453EfiIp4ConfigStart (\r
454 IN EFI_IP4_CONFIG_PROTOCOL *This,\r
455 IN EFI_EVENT DoneEvent,\r
456 IN EFI_EVENT ReconfigEvent\r
457 );\r
458\r
459/**\r
460 Stops running the configuration policy for the EFI IPv4 Protocol driver.\r
461\r
462 The Stop() function stops the configuration policy for the EFI IPv4 Protocol driver.\r
463 All configuration data will be lost after calling Stop().\r
464\r
465 @param This Pointer to the EFI_IP4_CONFIG_PROTOCOL instance.\r
466\r
467 @retval EFI_SUCCESS The configuration policy for the EFI IPv4 Protocol\r
468 driver has been stopped.\r
469 @retval EFI_INVALID_PARAMETER This is NULL.\r
470 @retval EFI_NOT_STARTED The configuration policy for the EFI IPv4 Protocol\r
471 driver was not started.\r
472\r
473**/\r
474EFI_STATUS\r
475EFIAPI\r
476EfiIp4ConfigStop (\r
477 IN EFI_IP4_CONFIG_PROTOCOL *This\r
478 );\r
479\r
480/**\r
481 Returns the default configuration data (if any) for the EFI IPv4 Protocol driver.\r
482\r
483 The GetData() function returns the current configuration data for the EFI IPv4\r
484 Protocol driver after the configuration policy has completed.\r
485\r
486 @param This Pointer to the EFI_IP4_CONFIG_PROTOCOL instance.\r
487 @param ConfigDataSize On input, the size of the ConfigData buffer.\r
488 On output, the count of bytes that were written\r
489 into the ConfigData buffer.\r
490 @param ConfigData Pointer to the EFI IPv4 Configuration Protocol\r
491 driver configuration data structure.\r
492 Type EFI_IP4_IPCONFIG_DATA is defined in\r
493 "Related Definitions" below.\r
494\r
495 @retval EFI_SUCCESS The EFI IPv4 Protocol driver configuration has been returned.\r
496 @retval EFI_INVALID_PARAMETER This is NULL.\r
497 @retval EFI_NOT_STARTED The configuration policy for the EFI IPv4 Protocol\r
498 driver is not running.\r
499 @retval EFI_NOT_READY EFI IPv4 Protocol driver configuration is still running.\r
500 @retval EFI_ABORTED EFI IPv4 Protocol driver configuration could not complete.\r
501 Currently not implemented.\r
502 @retval EFI_BUFFER_TOO_SMALL *ConfigDataSize is smaller than the configuration\r
503 data buffer or ConfigData is NULL.\r
504\r
505**/\r
506EFI_STATUS\r
507EFIAPI\r
508EfiIp4ConfigGetData (\r
509 IN EFI_IP4_CONFIG_PROTOCOL *This,\r
510 IN OUT UINTN *ConfigDataSize,\r
511 OUT EFI_IP4_IPCONFIG_DATA *ConfigData OPTIONAL\r
512 );\r
513\r
9f82599a 514/**\r
515 A dedicated timer is used to poll underlying media status. In case of\r
516 cable swap, a new round auto configuration will be initiated. The timer \r
517 will signal the IP4 to run the auto configuration again. IP4 driver will free\r
518 old IP address related resource, such as route table and Interface, then\r
519 initiate a DHCP round by IP4Config->Start to acquire new IP, eventually\r
520 create route table for new IP address.\r
521\r
522 @param[in] Event The IP4 service instance's heart beat timer.\r
523 @param[in] Context The IP4 service instance.\r
524\r
525**/\r
526VOID\r
527EFIAPI\r
528MediaChangeDetect (\r
529 IN EFI_EVENT Event,\r
530 IN VOID *Context\r
531 );\r
532\r
83cbd279 533#endif\r